Two Fans Rush Field to Hug Henry

Two fans rush the field to hug New York Red Bulls forward Thierry Henry after the Houston Dynamo tied the game. The two fans make the security guards look like fools for a while, especially the kid in the blue shirt, but eventually they're both caught.

What I don't get is why this Houston Dynamo fan grabbed one of the field on rushers and pushed him back to the security guards - see this in the second video below. Why not just stay out of it?

I'm guessing the guy in the Dalglish jersey below might be a cop or something. Why not leave the kid to run from the security guards on his own?

Henry took it fairly well, but has to be a bit scary when two fans come out of nowhere to jump on you.